вход по аккаунту


Патент USA US3072281

код для вставки
Jan. 8, 1963
Filed March 13, 1959
2 Sheets-Sheet 1
Jan. 8, 1963
Filed March 15, 1959
2 Sheets-Sheet 2
United grates lFatent @?ice
Patented Jan. 8, 1963
Daniel R. Costello, 20028 15th NE, Seattle, Wash.
Filed Mar. 13, 1959, Ser. No. 799,245
4 Claims. (Cl. 214-77)
At each of the two ends of the bed there is provided a
bracket 29 presenting a journal box 21. These brackets
are welded or otherwise rigidly secured to the end chan
nels 13 in positions such that the two journal boxes hang
therefrom, occupying a coinciding horizontal axis under
lying said channels on the longitudinal median line of the
This invention relates to an improved truck-loading
bed. A substantial yoke fabricated from tubular pipe
hoist of the type carried by the truck as a permanent ad
stock and designated generally by 22 receives a rotary
junct thereof so as to enable a truck operator to load and
journal from the journal boxes. To produce the journal
unload his truck by power derived from the engine of 10 mountings, moderately long side branches 23 of the yoke
the truck in the many instances where a powered fork-lift
integrally connect by their root ends with inwardly di
is not conveniently available. The present application is
rected trunnions 24, and such trunnions are connected
a continuation-in-part of my application for Letters Patent
directly by a cross-piece so that the yoke becomes, in ef
of the United States ?led June 3, 1958, Ser. No. 739,539,
fect, an integral part of a continuous loop having one
now abandoned.
15 cross-branch 25 close by underlying the bed while the
The invention has for its general object the provision of
other cross-branch 26 overlies the bed at a fairly con
a device of the character described which is of com
siderable height thereabove. Both cross-branches are sub
paratively simple and inexpensive construction, one which
stantially rectilinear and lie parallel to one another.
is strong and durable, and which performs its intended
Cross-branch 26 serves the function of a bridge and will
loading and unloading work with unusual ease and ex 20 be hereinafter so termed.
pedition. It is a further and particular object to devise
The side branches 23 with their bridging piece 26 oper
a truck-carried loading structurewhich will handle loads
ate as a swing-frame movable in either lateral direction
lying alongside the truck and deposit the same upon the
about the center of the trunnions as an axis from a nor~
bed of the truck at any desired point within the length
mal centered position Whereat the side branches 23 lie
of the latter.
25 perpendicular to the bed into and from rather steeply in
Still additional objects and advantages in view will, with
clined positions placing the bridge 26 in an outboard loca
the foregoing, appear and be understood in the course of
tion as respects the side limits of the bed. To activate
the following description and claims, the invention con
the swing-frame in its said swing movement a hydraulic
sisting in the novel construction and in the adaptation and
cylinder-and-piston assembly has its cylinder 27 pivoted,
combination of parts hereinafter described and claimed. 30 as at 28, to a bracket 39 carried by the bed at one end
In the accompanying drawings:
FIG. 1 is a perspective view portraying the bed of a
truck equipped with a loading hoist constructed to em
body the preferred teachings of the present invention.
thereof. The piston contained in said cylinder is double—
acting and has its rod 31 pivoted, as at 32, to cars 33 fast
to a side branch 23 of the swing-frame.
The tubular bridge has a winch hoist hung therefrom,
FIG. 2 is a fragmentary longitudinal vertical sectional 35 with the hangers comprising a pair of invertedly applied
view drawn to an enlarged scale on line 2—2 of FIG. 1.
U-straps 34 having their depending legs rigidly attached
FIG. 3 is a fragmentary enlarged-scale perspective view
to a carriage 35. The loops of the straps loosely invest
detailing a harness arrangement for carrying hydraulic
the bridge 36 so that the carriage is free to swing about
hoses leading to the hoist proper.
the center of the bridge as an axis, and also admits to a
FIG. 4 is a fragmentary horizontal sectional view 40 sliding motion endwise to the axis of the bridge so as to
drawn to an enlarged scale on line 4—4 of FIG. 1.
be set at will at any selected point Within the length of the
FIG. 5 is a fragmentary transverse vertical sectional
bridge. The bearing surfaces of said straps are or may
view drawn to an enlarged scale on line 5-5 of FIG. 1;
be greased at periodic intervals to facilitate the described
FIG. 6 is a fragmentary transverse vertical sectional 45
A winch is journaled from the frame 35 for rotation
view on line 6-6 of FIG. 4.
about a horizontally disposed longitudinal axis. A cable
The loading device of the present invention is intended
or chain 36 carrying a hook 37 is wound on the winch
for use with truck or trailer bodies of the ?at-bed type.
drtun 38, and a reversible hydraulic motor 40 connects
Referring to the drawings said bed is designated by the
with the winch through reduction gearing contained in a
numeral 10. In the form in which I have here elected 50 gear box 41.
to illustrate, the same said bed presents a plank deck 11
To power the reversible hydraulic motor 40 and the
laid on cross-joists 12, the joists and planking being mar
double-acting piston contained in the cylinder 27, there
ginally contained by circumscribing channels 13 and de
is provided a pump 42 driven from the engine of the truck
riving support from longitudinal frame principals 14 dis
and having its eduction side connected by a hose 43
posed at opposite sides of the longitudinal median line 55 with a valve chest 44-. Hoses 45 and 46 lead from the
of the vehicle.
valve chest to an oil reservoir 47 and from the reservoir
to the induction side of the oil pump 42, respectively.
hanger 15 presents a short length of vertical pipe 16 giv
50-51 and 52~—53 denote pairs of hoses one of which
connects respective ports of the valve chest with the two
ing slide support to a related one of four bearing feet 17,
with each such bearing foot presenting a plurality of hori
ends of the cylinder and the other of which connects re
spective chest ports with opposite sides of the reversing
zontal through-bores spaced at intervals of the height and
adapted to be brought selectively into register with an
motor. Two valves are provided for the valve chest acti
opening in the pipe. These registering openings receive
vated by a respective manually operated handle, as 54 and
anchor pins 18 so as to releasably secure the feet 17
55, so as to control the piston and the motor individually.
At each of the four corners of the bed a respective
either in an elevated inoperative position or in a lowered 65 As can be seen from an inspection of FIGS. 1 and 3 the
position bearing upon the ground. In a manner believed
hoses 52 and 53 are strung through rings 56 carried by
to be apparent the function of these bearing feet is to
a line 57 stretched moderately taut between two ears 58
stabilize the bed of the truck or trailer, as the case may be,
and 59 Welded to the bridge at opposite ends thereof. It
when the hereinafter described loading device is being
operated in the performance of its intended loading or
unloading o?ice.
is here pointed out, should the described loading equip
ment be applied to a trailer, that quick-release couplings
are provided in the lines 46 and 43 enabling the same
to be detachably connected to a pump permanently asso
arm of said swing-frame lying beyond the rear end limit
of the bed so that loads picked up by the winch hoist
may be freely swung by said swing~frame to and from the
bed at any point between the extreme fore-and-aft end
limits of the bed.
ciatedwith a tractor truck.
In use the bridge is swung by the hydraulically acti
vated piston in either lateral direction from the normal
position shown by full lines in FIG. 6 into the outboard
positions shown by broken lines. The winch hoist is a
2. Structure as recited in claim 1 in which the hanger
means admits to a free swivelling relative to the bridge so
travelling unit in the sense that it may be moved at will
that the winch hoist will at all times center itself by force
endwise to the axis of the bridge and hence may pick up
of gravity directly below the bridge.
a load laying at any point alongside the bed of the truck
3. In combination with the load-receiving bed of a
and deposit the same in any desired position upon the 10
wheeled vehicle, a unitary swing-frame formed to a yoke
truck bed. Rather than relying upon a greased slide-way
shape so as to provide upright side arms connected across
the carriage 35 could, if desired, be suspended from the
axles of monorail-type wheels tracking upon the bridge.
It will be apparent that gravity so positions the winch
the top by a bridge having a length approximately the
for rocker motion in rotary journals provided by the bed
same as that of the bed and at the lower ends of said
hoist that the same hangs at all times perpendicular to the 15 side arms presenting inturned co-axial trunnions received
on the approximate longitudinal median line thereof,
It is thought that the invention will have been clearly
one at the front and the other at the rear of the bed, for
understood from the foregoing detailed description of my
swing movement of the bridge about the center of said
now-preferred illustrated embodiment. Changes in details
of construction will suggest themselves and may be re 20 trunnions as an axis from a normal position overlying
the axis into a position lying outboard of the bed at
sorted to without departing from the spirit of the inven
either side thereof, selectively, a winch hoist carried by
tion, wherefore it is my invention that no limitations be
said bridge of the swing-frame, and power operated means
implied and that the hereto annexed'claims be given a
for moving said swing-frame in its said swing movement,
scope fully commensurate with the broadest interpretation
means being provided permitting said winch hoist to be
to which the employed language fairly admits.
shifted at will to any selected point within the end limits
What I claim, is:
of the bridge, the front side arm of said swing-frame lying
1. In combination with a truck having a loadnreceiving
beyond the front end limit of the bed and the rear side
bed and a power-driven hydraulic pump, means for load
arm of said swing-frame lying beyond the rear end limit
ing said bed comprising a yoke-shaped swing-frame pro
viding upright side arms connected at the top by a hori 30 of the bed so that loads picked up by the Winch hoist may
be freely swung by said swing-frame to and from the bed
zontal bridge and having the lower ends of said side arms
journaled to the bed for swing motion about a horizontal
axis located on the approximate longitudinal median line
at any point between the extreme fore-and-aft end limits
of the bed.
of such bed, a hydraulic double-acting piston-and-cylin
4. Structure according to claim 5 in which the rotary
der jack assembly pivoted at one end to the bed and at 35 journals lie below the bed and wherein a cross-piece rigid
ly connects said trunnions below the bed and serves with
the other end to one of said side arms for swinging the
swing-frame so as to move the bridge from a position
- disposed outboard relative to the bed in either lateral
direction into a position overlying the bed, a winch hoist
providing a winding drum, hanger means suspending said 40
winch hoist from said bridge and including a carriage
movable at will relative to the bridge in a direction end
the side arms and bridge of the swing-frame to provide a
continuous integral loop.
References Cited in the file of this patent
wise thereto, a reversible hydraulic motor having its driven
end connected directly with the drum of the winch for
driving the drum, an oil reservoir for the hydraulic pump,
Pennock ______________ __ Dec. 2, 1873
Symons ______________ __ Oct. 10, 1950
Felkner _______________ __ Apr. 3, 1956
and means subjects to manual control for delivering oil
under the pressure of the pump to either end of the jack
cylinder or to either end of the hydraulic motor, selec
Le?ler ______________ __ Nov. 20,
White ______________ __ Mar.'25,
Toff _________________ __ Nov. 3,
Condon ______________ __ Mar. 8,
tively, while simultaneously bringing the opposite end of
the concerned hydraulic unit into communication with 50
the reservoir, the front side arm of said swing-frame lying
beyond the front end limit of the bed and the rear side
Germany ____________ __ May 8, 1935
Без категории
Размер файла
412 Кб
Пожаловаться на содержимое документа